diff --git a/website/index.html b/website/index.html
index e917363..daf0de0 100644
--- a/website/index.html
+++ b/website/index.html
@@ -100,7 +100,7 @@
               <tr>
                 <td><a href="help_openspades.html"><img src="img/openspades.png" height="64" alt="Tiny screenshot of OpenSpades"></a></td>
                 <td>OpenSpades</td>
-                <td>Mix between a first person shooter and Minecraft. Build defence structures, dig many tunnels or go on the offensive.</td>
+                <td>Mix between a first person shooter and Minecraft. Build defence structures, dig many tunnels or go on the offensive.<br><mark>Warning:</mark> uses potentially non-open assets.</td>
                 <td><a href="help_openspades.html">More info</a></td>
               </tr>
               <tr>